🧠 on Instagram: "A restaurant in Japan conducted a demonstration to show how quickly germs can spread through everyday interactions. In the experiment, one participant’s hand was coated with a fluorescent substance to simulate germs. After 30 minutes of dining, sharing utensils, and moving around the restaurant, the substance had spread to plates, door handles, food trays, and several other guests. The spread became clearly visible under UV light. The demonstration shows how easily microorganis

physicsfun on Instagram: "Dual Phosphorescence: this stunning “Mexican onyx” bowl is carved out of natural rock that contains phosphorescent calcite that glows in the dark after exposure to ultraviolet light. If exposed to longwave (lower energy) UV-A it glows green, but if exposed to shortwave (higher energy) UV-C it glows a ghostly blue. Phosphorescence is a quantum mechanical phenomenon where high energy UV photons are absorbed by electrons which are then boosted to higher energy levels. The